| RS Delivers | 537-1385 | 0.2916 | 1 | 4330 | | Eaton | | 0.2916 @ 500 |
| Hotenda | H574653 | 0.49006 | 1 | 500 | | Eaton (formerly Cooper Bussmann) | | 0.49006 @ 500 |
| iodParts | S506-500-R | 0.502 | 500 | 635 | | Eaton | | 0.502 @ 500 |
| Onlinecomponents.com | S506-500-R | 0.55 | 1 | 2198 | | Bussmann / Eaton | | 0.406 @ 501 |
  | specialtycontrolsystems.com | S506-500-R | 0.59 | 1 | 500 | | BUSSMAN | | 0.59 @ 500 |
  | Newark | 93K0020 | 0.619 | 1 | 12354 | | EATON BUSSMANN | | 0.619 @ 500 |
| Verical | BK/S506-500-R | 1.29 | 4 | 500 | | Eaton | | 1.29 @ 500 |
  | Radwell | S506-500-R | 1.32 | 5 | 500 | | BUSSMANN | | 1.32 @ 500 |
  | Walker Industrial | S506-500-R | 1.85 | 5 | 500 | 17 | Cooper Bussmann | | 1.85 @ 500 |
  | AI Consolidated | S506-500-R-BUSSMANN | 2.02 | 1 | 500 | | Bussmann Eaton Cooper Fuses | 0.0159 | 2.02 @ 500 |
| Dale-Electric | S506-500-R | 2.03 | 1 | 500 | | Cooper Bussmann | | 2.03 @ 500 |
| Waldom | EATON S506-500-R | 2.22 | 1 | 500 | | Eaton | | 2.22 @ 500 |
| Mouser | 504-BK/S506-500-R | 2.66 | 1 | 745 | | Eaton | | 2.66 @ 500 |
  | Galco | S506-500-R-BUSS | 2.83 | 5 | 500 | | Bussmann | 0.022 | 2.83 @ 500 |
| us.rs-online.com | 74057191 | 3.08 | 5 | 500 | | Eaton Electronics | | 3.08 @ 500 |
| Graybar | 25142677 | 3.7744 | 5 | 500 | | Bussmann (Eaton) | | 3.7744 @ 500 |
| crescentelectric.com | 74654 | 4.25 | 1 | 500 | | Eaton Bussmann series | | 4.25 @ 500 |
  | Digi-Key | S506-500-R-ND | 4.322 | 5 | 500 | | Eaton - Electronics Division | | 4.322 @ 500 |
| steinerelectric.com | 393398 | 4.39 | 1 | 500 | | BUSSMANN | | 4.39 @ 500 |
  | Platt.com | 0127167 | 4.42 | 1 | 500 | | Eaton/Bussmann Series | | 4.42 @ 500 |
| Airline Hydraulics | BUSSMANN S506-500-R | 6.32 | 1 | 500 | | Cooper Bussmann | | 6.32 @ 500 |
| AmazonTP | B013ENLGNY | 11.19 | 1 | 500 | 20 | BUSSMANN BY EATON | | 11.19 @ 500 |
  | Zoro | G3079921 | 13.79 | 1 | 500 | | Eaton Bussmann | 0.02 | 13.79 @ 500 |
| standardelectricsupply.com | 2303277 | 15.05 | 1 | 500 | | Bussmann | | 15.05 @ 500 |
  | sustainablesupply.com | C1177090 | 22.6 | 1 | 500 | | Eaton | 0.02 | 22.6 @ 500 |
  | Raptor Supplies | AB8XGM | 32.939478 | 1 | 500 | | BUSSMANN | | 32.939478 @ 500 |
| AmazonSC | B011NDSNGK | 34.0 | 1 | 500 | | Eaton Bussmann | | 34.0 @ 500 |
  | turtle.com | BUS BK/S506-500-R | 305.24 | 1 | 500 | | Eaton | | 305.24 @ 500 |